package com.sky.service.impl;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Collections;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService{
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 分页查询套餐
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.page(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.insert(setmeal);
        Long setmealId = setmeal.getId();
        List<SetmealDish> SetmealDishList = setmealDTO.getSetmealDishes();
        SetmealDishList.forEach(item -> item.setSetmealId(setmealId));
        setmealDishMapper.insertBatch(SetmealDishList);
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Transactional
    public void deleteById(List<Long> ids) {
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            Integer status = setmeal.getStatus();
            if (status == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        setmealMapper.deleteByIds(ids);
        setmealDishMapper.deleteByIds(ids);
    }

    /**
     * 根据id查询套餐详细数据
     * @param id
     * @return
     */
    @Override
    @Transactional
    public SetmealVO getById(Long id) {
        SetmealVO setmealVO = new SetmealVO();
        Setmeal setmeal =setmealMapper.getById(id);
        BeanUtils.copyProperties(setmeal,setmealVO);
        List<SetmealDish> setmealDishes = setmealDishMapper.getById(id);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐信息
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void updateWithDish(SetmealDTO setmealDTO) {
        //修改套餐基本属性
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);
        //删除所有原有菜品
        setmealDishMapper.deleteByIds(Collections.singletonList(setmealDTO.getId()));
        //插入新的菜品
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if(setmealDishes!=null && setmealDishes.size()>0){
            setmealDishes.forEach(item->item.setSetmealId(setmealDTO.getId()));
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    /**
     * 修改套餐售卖状态
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        if(status == StatusConstant.ENABLE){
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach(dish -> {
                    if(StatusConstant.DISABLE == dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }
    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

}
